A viewvc security update has been released for Debian GNU/Linux 10 LTS to address two issues.

DLA 3266-1: viewvc security update

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Debian LTS Advisory DLA-3266-1 debian-lts@lists.debian.org
  https://www.debian.org/lts/security/ Chris Lamb
January 11, 2023   https://wiki.debian.org/LTS
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Package : viewvc
Version : 1.1.26-1+deb10u1
CVE IDs : CVE-2023-22456 CVE-2023-22464

It was discovered that there were two issues in viewvc, a web-based
interface for browsing Subversion and CVS repositories. The attack
vectors involved files with unsafe names; names that, when embedded
into an HTML stream, could cause the browser to run unwanted code.

For Debian 10 buster, these problems have been fixed in version
1.1.26-1+deb10u1.

We recommend that you upgrade your viewvc packages.

For the detailed security status of viewvc please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/viewvc

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://wiki.debian.org/LTS